论文部分内容阅读
为提高苯并噁嗪树脂的耐高温性能,以水杨醛、对氨基苯酚、环三磷腈衍生物为原料通过多步反应制备了环三磷腈基苯并噁嗪单体(CPBOZ),通过核磁共振(1 H-NMR、31 P-NMR)和傅里叶红外光谱(FT-IR)对所合成化合物的结构进行了表征;利用FT-IR和热重分析(TGA)考察了苯并噁嗪的固化行为及树脂的热稳定性。结果显示:环三磷腈结构的引入,显著提高了相应苯并噁嗪树脂的耐热性,其固化后失重率为5%和失重率为10%时的温度分别达到了365℃和397℃;在900℃(N2)时的失重率达到了48.2%,比普通苯并噁嗪树脂提高了约65.64%。
In order to improve the high temperature resistance of benzoxazine resin, cyclotriphosphazene benzoxazine monomer (CPBOZ) was prepared by multiple steps using salicylaldehyde, p-aminophenol and cyclotriphosphazene derivatives as raw materials. The structures of the synthesized compounds were characterized by 1 H-NMR, 31 P-NMR and FT-IR. The structures of the compounds were characterized by FT-IR and TGA. Curing behavior of oxazine and thermal stability of resin. The results showed that the introduction of cyclotriphosphazene structure significantly increased the heat resistance of the corresponding benzoxazine resins. The results showed that when the weight loss rate was 5% and the weight loss rate was 10%, the temperature reached 365 ℃ and 397 ℃ respectively ; Weight loss rate reached 48.2% at 900 ℃ (N2), which was 65.64% higher than that of common benzoxazine resin.